Pressure in a Rectangular Tank

1. A rectangular tank 2.0 m by 2.0 m by 3.5 m high contains gasoline, with a density of 0.68E3 kg/m3, to a depth of 2.5 m. What is the gauge pressure anywhere 1.2 m below the surface of the gasoline?

2. P=Ps + Pl Pl=density (g) (h)

3. I'm sure this is an easy problem, but I don't know where I am going wrong. I set Ps to atmospheric pressure at 1.013 E5 and Pl = .68 E3 (9.81) (2.5). I added Ps and Pl together to get 1.18 E5, but this is incorrect. Please help out if you can. Thanks.